I was reading a guide Ken Rockwell produced http://www.kenrockwell.com/tech/format.htm
and he writes that when using 220 film on 6x4.5 format the user gets 32 frames. When using 6x6 the user gets 24. Given that the film feeds horizontally, and the opening on the camera is faced horizontally...shouldn't 6cm+6cm+6cm...etc. equal 24? I may be very confused...
I can't speak for other cameras but my Mamiya 645 AFD feeds film vertically so I would assume most 6*4.5 formats do the same.